The invention relates to a disconnection-preventing parallel-connected gap device which belongs to the technical field of lightning protection of a distribution circuit, and aims at providing a disconnection-preventing parallel-connected gap lightning protection device for the distribution circuit, which can be used for effectively solving the problem of lightning stroke disconnection of the distribution circuit and more accurately positioning lightning stroke flashover and is simple in structure and convenient to install. The adopted technical scheme is as follows: the disconnection-preventing parallel-connected gap device comprises an drainage tube, a wire side electrode and a grounding side electrode, wherein the drainage tube tightly sleeves the wire, and the inner wall of the drainage tube is provided with a plurality of thorns which penetrate through an insulating layer; the horizontal end part of the right-angled L-shaped wire side electrode is provided with a sphere, and the vertical end part of the right-angled L-shaped wire side electrode is fixedly connected with the drainage tube; and one end of the grounding side electrode is provided with the sphere, the other end of the grounding side electrode is fixedly connected with the bottom end of an insulator, one end, which is close to the sphere, of the grounding side electrode is provided with a ridge-shaped convex folding line structure, and the electrode end parts of the wire side electrode and the grounding side electrode are absolutely aligned. The disconnection-preventing parallel-connected gap device disclosed by the invention is installed on an electric wire so as to be used for preventing the lightning stroke disconnection.